Circuit arrangement for the registration of electric impulses



H. A. WIBERG July 11, 1933.

CIRCUIT ARRANGEMENT FOR THE REGISTRATION OF ELECTRIC IMPULSES Filed Sept. 24, 1929 j, WM

Patented July 11, 1933 n UNI'EED STATES PATENT oFFicE HELGE ALLAN WIBERG, OF vFALUN, SNEDEN,v ASSIGNOR `T() TELEFONAKTIEBOLAGET L. Irl. ERICSSON, GF STGCKHOLM, SWEDEN, A COMYANY SWEDEN" CIRCUET ARRANGEMENT FOB THE REGISTRATION 0F ELECTRIC IMPULSES f Application filed September 24, 1929, Serial No. 394,913, and in Sweden October 4, 1928.

,The present invention relates to circuit arrangements in which impulses sent out from mutually independent devices have .to per form similar operations in a common device ot any liind; said operations, by way of example, consisting in the registration or the summing-up of impulses sent out from a number of impulse sending devices. It might then occur that the mutually independent im- L@ pulses are sent out at such moments that they entirely or partially cover or coincide with one another' in which case they might be undesirably registered as a single impulse.` The problem, them is to separate the entirely or partially coinciding impulses in such a man-` ner that they are received successively in the registering device and perform their 'functions without disturbing each other. Asa practical example a metering system may be A mentioned in which a number of electric meters are equipped. with contact devices whereby an 'impulse is sent out, tor instance, for each measured kilowatt hour,-said impulses being registered by a common counter to indicate the sum of the impulses sent out within a certain period of time or in other words the number of all the kilowatt hours measured by all the meters.

ln hitherto known arrangements for said purpose, planet wheel gears or rotating contact devices or the like have been used of a more or less complicated nature which render the registration device expensive and also easily cause faulty registrations.

The object of the present invention is to bring about a simple and, at the same time, reliable device ot this kind. The invention consists in the combination of anumber of relays forming an impulse repeating device '3 interconnected between the impulse sending devices and the common registering device in such a manner that when several relays are simultaneously actuated by the impulse sending devices only one relay Alets through impulses to the registering device whereas the other' relays are held ready thereafter to forward impulses in turn to the registering device in that order of sequence which corresponds to their position in relation to the first impulse forwarding relay.

On the accompanying drawing Figures l and 2 show circuit diagrams of ditlerent embodiments of a circuit arrangement according to the invention.

In Figures l, A1, A3, A3 indicate a number of electric meters each of which is adapted to close a contact T1, T2, T3 respectively, by wayY of example, for each kilowatt-hour measured. Through the closed contact current is supplied from the plus-pole of the battery over the 'conductor l, anyone of the above mentioned contacts and through conductors 2 or 3 or l to a primary impulse separating relay B1, B3, B3 respectively, whereupon the circuit is completed over the wire 5 to the negative pole of the battery. Said relays are adapted to close contacts C1, C2, C3 respectively, whereby current is supplied through secondary impulse separating relays D1, D2, D3 respectively `over a circuit which, for instance, for relay D3 is traced as follows: From the plus-pole of the battery over the conducto-r 6, the Contact O ot' a relay N, conductor 7, contactP of the relay M, conductor 8, contact C1 of relay B1, front contact 9 of the same relay, winding of relay D1, conductor l0, back contact and contact E3 of relay D3, conductor 11, back contact and contact E3 of relay D3, conductor l2, conductor 5 and negative pole ot the battery. Tf the relay DZ is to be actuated, the conductor 8 by means of contact G1 and back contact 2G of relay B1 is connect-ed to the wire 13 and a circuit is then completed over the contact (Lot1 the relay B3 and front contact 18 of the relayBQ through the winding of the relay D2 to the wire ll. A circuit may be closed in a similar manner through the relay D3. The' relays D1, D3, D3 close in turn contacts E3, F12, E3 respectively, whereby current is supplied to a common registering device or counter F over a circuit which in the case the relay D1 should be actuated, is traced as follows The plus-pole of the battery,conduc tor 6, winding of the counter F, conductor lll, front contact 15 of the relay D1, contact E wire 10, back contact 16 and Contact E3 of the relay DS3, wire ll, bach contact 17 and contact E3 of the relay D3, wire 12, conductor 5 and the negative pole of the battery. Similar circuits are closed upon actuation of the relays D.2 and D3 through the counter' F. The counter F will thus register one unit for each impulse sent from the meters A1, A2, A3 respectively.

As will be seen from the drawing the operating circuits of the secondary relays are carried over trent contacts 9, 18, and 19 respectively of the primary relays as well as over the contacts CL, C2, C3 of the same relays, the said contacts being connected in series so that if several primary relays are operated simultaneously, only the secondary relays at the extreme left hand side obtains current. The armatures of th-e primary relays are arranged so as to have` two positions one position when the contacts C1, C2, spectively of the same lean against the back contacts 20, 21, 22 respectively. This may be obtained by providing the armatures with weights 23, 24, 25 respectively just above the pivot axis. The armatures G1, C2, C3 thus may be kept in locked position until l they are unlocked by separate relays G1, G2,

it., which are arranged via contacts H1, H2, H?, of the secondary relays over circuits which are traced as follows: For the relay Grl from the plus-pole of the battery over conductor 1 through Winding of the relay G1, contact il, and front Contact 26 of the relay D1, contact L and front contact 27 of relay M, conductor 2S. and minus-pole of the battery. For the relay G2, plus-pole of the battery, conductor 1, windingr of the relay G2, Contact H2 and front contact 29 o the relay D2, conductor 30, contact L and front contact 27 of relay M, conductor 2S and minus-pole of the battery. For relay G3 plus-pole of the battery. conductor l, winding,` of relay G3, contact H3 and front contact 31 of relay D3, conductors 32 and 30, contact L and front contact 27 o't' the relay M, conductor 28, minus-pole of the battery.

The circuits of the secondary relays are also controlled by series connected contacts 12,. E2, E3 respectively, which lean against back contacts 3?. 16 and 17. in such a manner that -each secondary relay upon operatinev will interrupt the circuit of all secondary relays which are disposed further to the lett.

If, by way of example, the meters A2, A3

should send impulses simultaneously to the relays Bg and B3 respectively, the operation will proceeed as follows: The armatures C2 and G3 are both attracted respectively but only the relay D2 is energized as the circuit over the contact C2 to the relay D3 is interrupted at the contact C2.

The relay D2 connects itself into a holding L circuit traced .from the plus-pole of the bat-4 tery, conductor 6, contact O of the relay N, Front contact 34 and contact K2 ot the relay Dg, relay D2, conductor l1, front contact 17 and contact E?, of the relay D3, conductor 12, conductor 5 and minus-pole of the bat- Cg re" tery. Moreover the counter F obtains current over a circuit running from the pluspole of the battery, conductor 6, counter F, conductor 14, front contact 35 and contact E2 of the relay D2, conductor 11, back contact 17 and contact E3 of the relay D, conductor 12, conductor 5 and minus-pole ot the battery. At the same time the current path over the conductor 10 to the relay D1 is interrupted at the contact E2 ot' the secondary relay DL in such a manner as to make the said relay D] inoperative in case the meter il in this moment should actuate the rela-y B1. In the case last mentioned or if the meter A1 would send impulses simultaneously with the meter A2 the operating circuit of the re lay D2 already traced would be opened by the armature C1. It is for avoiding such an in convenience that the relay D2 is provided with the holding contact K2.

Vhen the counter F has thus obtained current over the contact E2 of the relay D2 and has been advanced another step a contact I ot the counter is closed, whereby a relay N 1s connected into circuit. The said circuit runs as follows Plus-pole of the battery, conductor G, winding of the relay M, conductor 3G, contact I, front Contact 37 ot the counter F, conductor 28 and the minus-pole of the battery. The relay M is provided with a Contact P which normally leans against the back Contact 37a and two contactsL and R which are normally opened. When the re lay M is energized the contact L is brought close to the front contact 27, a circuit is closed tor the moment from the minus-pole of the battery over contacts 27 and L of the relay M, conductor 30, conductor 38. front contact 29 and contact H2 of the relav D3, conductor Winding of the relav G2, conductor 40, conductor 1 and plus-puole of the battery. Thereby the relay G2 is brought to throw over the Contact C2. At the same time the circuit over the armature C2 is opened at the contacts 37a and P of the relav M. Further the relay M upon operating connects up the relay N at its contacts R and 41 over a circuit running' as follows: Plus-pole oir the battery, conductor 6, windingl ot the relay N,

conductor 42, contact R and front contact 41 oit' the relay M, conductor 28, minus-pole of the battery. The relay N opens at its contacts O and 42, the holding circuit already traced of the relay D2 which releases its armature and causes the deencrgizatiou of the counter relay F and the control relays M and N. It, as above assumed, the primary relay B1 has been energized in the meantime, a circuit will now be closed through the relay Dl over the contact P and the armature C1, in its locked position. The above described operation is then repeated in such a manner as to cause the counter F to be advanced another step. After the armature C1 has been restored to its normal position and the relays M and N have been deenergized, the relay D3 Will be operated in a similar' way to register the impulse from the meter A3.

Fig. 2 shows a simpliiied circuit diagram using electrically self-locking primary relays. The relays Gl, G2, G3 in Figure l are thus replaced by resistances S1, S2, S3 included in the continously closed circuits of the primary relays and arranged to be shortcircuited by the impulse contacts T1, T2, T3 respectively. Said resistances are sov designed that the current normally iiowing through the primary relays is insuilicient to operate said relays. Upon the closure of a Contact T1, T2, T3 the current through the corresponding primary relay will be strengthened to such an extent as to cause the relay to attract its armature. A primary relay B1, B2, B3, upon being thus energized, will cause the same operation as above described with the exception only that the unlocking ot the armatures of the primary relays is eected by a complete deenergization or' said relays. For this purpose the primary relays are arranged to be short-circuited over the contacts H1, H2, H3 respectively of the secondary relays such short-circuit being closed at the contact L upon the relay M attracting its armature. After said shortcircuit has been opened, the armature of the primary relay will remain in its normal're` tracted position as the current now flowing through the primary relay and the appertaining resistance S1, SL, S; respectively is insuilicient to cause the relay to attract its armature.

I claimzl. .ln an impulse registering system the combination et a number of impulse senders, an impulse registering device to be operated by impulses from said impulse senders, an impulse separator interconnected between lsaid impulse senders and impulse registering device and comprising a primary impulse separating relay ot the self-locking type for each impulse sender means for energizing said relay.T by the impulses sent from the impulse sender, a secondary impulse separating relay for cach` impulse sender, the circuits oit the secondary relays being controlled by the primary relays so as to prevent moro than one secondary relay to be operated at a time and to prepare the circuit of another secondary relay upon a primary relay being unlocked, means under the controll of said secondary relays for unlocking said primary relays in succession, and means for sending an unlocking impulse for each operation of the registering device.

2. In an impulse registering system the combination of a number ot impulse senders, impulse circuits for said senders, selflocliing primary impulse separating relays in said circuits, secondary impulse separating relays, operating circuits for Said secondary relays controlled by said primary relays so as to prevent more than one secondary relay to be operated at a time and to prepare the circuit of another secondary relay upon a primary relay being unlocked, an impulse registering device, means for unlocking said primary relays, circuits for said unlocking means under the control of the appertaining secondary relays, and means for sending an unlocking impulse for each operation of the registering device.

3. An impulse registering system as claimed in claim 2, in which the circuits of the secondary separating-relays are carried over series connected back contacts on the primary separating relays as well as over series connected back contacts on the secondary relays.

el. In an impulse registering system the combination of a number of impulse senders, impulse circuits for said senders, selflocking primary impulse separating relays in said circuits, secondary impulse separating relays, operating circuits for said secondary relays controlled by said primary relays so as to prevent more than one secondary relay to be'operated at a time and to prepare the circuit of another secondary relay upon a primary relay being unlocked, an impulse registering device, a short-circuit for each of saidprimary relays arranged under the control of the appertaining secondary relay and means under the control of the impulse registering device for unlocking said primary relays by closing such short-circuit for Veach operation of the registering device.

5. An impulse registering system as claimed in claim 2, in which the secondary separating relays are associated with holding circuits and switching means under the control of the impulse registering device for opening said holding circuits upon each operation ot the registering device.

In testimony whereof I afiix my signature.

HELGE ALLAN WIBERG. 

